Yes, I'm afraid this is a known bug in ANTS Performance Profiler 7.4 and lower, related to scaling in high DPI modes. Sorry about that.
I'm pleased to tell you, however, that the startup screen and other parts of the Performance Profiler are being completely redesigned for v. 8.0, and (because we're now using WPF) this bug is fixed.
We're still a few weeks away from releasing v. 8.0, but you can download the beta from http://www.red-gate.com/labs/ants-performance-profiler/
. We'd be glad to hear your feedback on the new screen.